Rolls for rolling girder-rails



(No Model.)

A. J. MOXHAM.

ROLL FOR ROLLING GIRDER RAILS.

No.. 330,997. Patented Nov.. Z4, 1885.

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ROLLS FOR ROLLING GIRDER=RAHLS.

SPECIFICATION forming part of Letters Patent No. 330,997, dated November24, 1885.

Application filed October 1, 1885. Serial'No. 178,717. (No model.)

To aZZ whom it may concern:

Be it known that I, ARTHUR J. MOXHAM, of Johnstown, in the county ofCambria and State of Pennsylvania, have invented a new and usefulImprovement in Rolls for Rolling Girder-Rails for Street-Car Tracks,which invention or improvement is fully set forth and illustrated in thefollowing specification and accompanying drawing.

The object of this invention is to provide a set of rolls for rollingside-bearing girderrails having a cross-section substantially of theform indicated by the last finishing-pass illustrated in theaccompanying drawing.

The invention consists of the rolls having the conformation of passeshereinafter described, and specifically set forth in` the claim.

In the accompanying drawing-the several parts are indicated by lettersas follows: A indicates the top roll of a set of rolls threehigh; B, themiddle roll, and C the bottom roll. The rolls, however, may be madetwohigh, if preferred. Said rolls contain six passes, numbered,respectively, from 1 to 6, inclusive, as shown in the drawing. Pass N o.1 is intended to receive a billet rolled to its approximate shape by anyknown method, or as may be done by the means shown in Patent No.312,213, issued to me February 10, 1885. The course of rolling such abillet in the rolls is as follows: The hot billet is first run throughpass No. 1, then through pass No. 2, then through pass No. 3, and thensuccessively through the -remaining passes in regular order, ending withthe last pass, N o. 6. It will be observed that in passes Nos. 1, 2, and3 the reduction of metal to form the web proper of the rail when nished,as shown in the last pass, No. 6, is greater in proportion tothe workperformed on the rest of the metal than itis in any of the succeedingpasses. It will also be observed that the reduction of metal at thepoints a b and c d in these earlier passes is less in proportion to thaton the rest of the rail than it is in the subsequent passes, inconsequence of which a sufficient amount of metal is left at therespective points mentioned to compensate for the wire drawing or flowinduced at these points by the eXtra work put upon the web portion ofthe rail, and still leave enough material to secure the properelongation at said four points in the subsequent passes. By this meansthe rail is delivered free from distortion. It will be further observedthat the tendency of the metal to run away from the points c d, owing tothe wire drawing above mentioned, is checked by allowing ample room forthe spread of the metal at these points in the earlier passes.

The change of form effected in pass No. 2 by running the billettherethrough immediately out of pass No. 1 is such that an excessiveamount of work is put upon the point c in pass No. 2, said point beingone where great iiow of metal is notinduced from other causes. In theseearlier passes the grooves are so shaped that the greater bulk Vof thespread of metal is toward the end of the rail at c d for the purpose ofchecking the tendency to wiredraw the metal at these points.

For the purpose of draft77 upon the head of the rail at a b, the passesare so proportioned that the point-marked F, situated at the offsetbetween the head and tram of the proposed section of rail, is made acommon or neutral point in the distribution of draft. Such point may ormay not be at the parting-lines of the rolls, as may be found advisable,according to the varying nature of the material used whether iron, softsteel, or hard steel.

It is obvious that changes, slight in character, not affecting theprinciple of this invention herein described may be made in these rollsbut the rolling can be best effected in the manner shown.

If deemed desirable, these rolls can be used with an additional passsuited to bend up the side tram of the rail after being finished in passNo. 6 into a super-elevated guard for the manufacture of the recentlymuch-used rolled girder curve-rails.

Having thus fully described my said improvement in rolls as of myinvention, I claim- A set of rolls for rolling girder-rails, providedwith passes of the respective shapes shown in the accompanying drawingand therein numbered from 1 to 6, inclusive, substantially as described,for the purposes set forth.

A. J. MOXHAM.

